1results about How to "Reduce uneven deformation" patented technology

The application discloses a high-strength hot-rolled rail low-residual stress straightening method and belongs to the technical field of rail production processes. The method realizes effective reduction of the bending degree of the rail before straightening and precise control of uneven deformation in the straightening process by implementing the precise reverse pre-bending process on the rail cooling stage, cooperating with the optimized straightening machine horizontal roll reduction parameters and the straightening speed control, finally controls the rail bottom residual stress of the 60kg / m (60, 60N) high-strength hot-rolled rail below 250MPa, and reduces 37-46MPa compared with the traditional process, significantly improves the rail straightness and use safety, and enhances the product market competitiveness.